Bottom surface portion of a shoe outsole



FIG. 1 is a perspective view of a bottom surface portion of a shoe outsole showing my new design;

FIG. 2 is a plan view thereof; and,

FIG. 3 is a second perspective view thereof.

The uneven broken line showing of the remainder of the shoe is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a bottom surface portion of a shoe outsole, as shown and described. 